One bank wallet item won't sync

I have one French bank wallet item that won't sync at all, not even the name of the bank, whereas my Master card account with the same bank syncs fine. I've tried deleting and re entering the account but there's nothing showing at all apart from one note written. Is it because I've customised it myself because you still haven't done anything about customising wallet items!

So, completely deleting the existing customized Wallet item and creating a new one from scratch doesn't fix it? That is, you can't sync the new Wallet item, either?

Yes, it's just that one and I've made a new one from scratch but I'll try yet again just to make sure as it's the only item that's done that. My French bank account Master Card has synched fine, as have all the others, so I'm sure it's something in this particular item.